Tires crunched across the frozen mess on roads and parking lots as drivers slowly made their way to work. Most main roads were plowed and passable, though black ice was a consideration as freezing drizzle continued in spots.

Hundreds of schools in Western Pennsylvania delayed the start of classes for two hours, while others simply decided to cancel classes for the day.(Full list: Wednesday's school closings & delays)

PennDOT has lowered the speed limit to 45 mph on Interstate 376 (Parkway East and Parkway West), Interstate 579, Interstate 279 (Parkway North), Interstate 79, Route 28 in Allegheny County, Route 30 in Westmoreland County and several other major highways around the region.(Full list: See which highways have lower speed limits today)